Consolidated Statements of Changes in Equity (Unaudited) (Parenthetical) (USD $)	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Dividends per basic share paid	$ 0.06	$ 0.06	$ 0.18	$ 0.18
Class A Common Stock
Common stock, par value	$ 0.001	$ 0.001	$ 0.001	$ 0.001
Class B Common Stock
Common stock, par value	$ 0.001	$ 0.001	$ 0.001	$ 0.001
Class C Common Stock
Common stock, par value	$ 0.01	$ 0.01	$ 0.01	$ 0.01
Accumulated (Deficit)
Dividends per basic share paid			$ 0.18	$ 0.18
Stockholders' Equity
Dividends per basic share paid			$ 0.18	$ 0.18

Face amount or stated value of common stock per share; generally not indicative of the fair market value per share.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 30

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.29)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix:	us-gaap
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant